Oh, perfect thread for a showerthought I had a few days ago:
For some reason, there's a hard split in my mind between 20th and 21st century processors, even though they're generally pretty similar, and the split isn't even clean 20th century since Pentium 4 is 20th and is on the modern end of that. AXP/P4 just feel more like modern CPUs than Athlon/P3 do, even though there's no objective reason to feel that way because both are almost identical in terms of software support and the like to their predecessors. Maybe the move from measuring in MHz to GHz? I guess Athlon 1GHz is usually rendered "Athlon 1GHz"...
I'm unsure of where Motorola 7400 falls in this. Objectively, it's to the 750 as the PIII was to the PII, but it's just so associated with the new millennium and Mac OS X. So, it feels weird to use Mac OS 9 on any G4 (except the Titanium PowerBooks I guess?), 98 and XP have a hard boundary where I'll use them at the PIII/Athlon/VIA C3/Transmeta Crusoe and P4/Athlon XP/VIA C7/Transmeta Efficeon line, and there's a weird dead zone between Pentium 4 and Opteron 200 where Linux doesn't really come into play that doesn't exist in PowerPC because I have it installed on a PowerBook G4 which is definitely closer to the former.
I guess for a bespoke combo for this thread, for some reason I just don't really care for matching GPU and CPU in terms of the year. I'll do a years-old CPU and more recent GPU combo (see my Pentium II with an FX 5200) or a years-old GPU and a more recent CPU (I'm considering getting an S3 ViRGE 325 and an Intel 740 to occasionally throw in either my Athlon 700 build or maybe a potential Athlon 550 since I have one of those lying around, or maybe swap the ViRGE into the Pentium II and have the 740 in the 550?), but like, a Riva TNT2 or Rage 128 just don't feel like they pair with a 700MHz Athlon or Pentium III, either CPU honestly feel more right to me paired with a GF4 Ti/Radeon 8500 (and the GPUs I'd pair with like a Pentium MMX/PII/PPC750). I can't really see the notion that a PC is only period accurate if all the parts come from the same year, there have to be some people that upgraded their computers with individual components two or three years down the line, and maybe that's where my mind is going with that, where that feels more "real" or "lived-in".
And yeah, as for XP, I have an AMD FX-6100 box that I use for XP Overkill, and it's got XP Pro x64 partly because nobody ever uses it and partly because why not use all 64 bits if I have them, in case any 64-bit software just so happens to run on it? So far drivers don't seem to be a big problem, both the Creative (Audigy 1) and Nvidia (GTX 970) drivers installed and work just fine.
I used Office 97 not only with XP but I think even a few years into getting back into Linux after having a Windows 7/8.1-shaped diversion from it, I just appreciated how it did everything I needed it to, nothing I didn't, and didn't cost $300. Nowadays I use LibreOffice but I can't deny I kind of miss the simplicity of Word 97 especially, I'd use it again if need be.
Bonus: in the modern day, anything Intel. Their GPUs are somewhat interesting but B580 is basically unobtainium at MSRP and I could easily find a used RX 7600 for half that price, let alone the $450 that seems to be the average scalper price. I've had a blacklist on any new Intel parts for years now, it's not a result of the 13th/14th gen thing (though that was fuel on the fire). I'm probably not going to buy an AMD Ryzen either unless I really have a need for it, so I guess that's the entire AMD64-based processor market gone right there, which is fine. There's plenty of decent options out there besides them, like Raptor Blackbird (PowerPC) and Radxa Orion (ARM) that are speed-competitive.